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In a survey of 169 respondents say that they never use a credit card, 1227 say that they use it sometimes, and 2834 say that they use it frequently. What is the probability that a randomly selected person uses a credit card frequently? Is it unlikely for someone to use a credit card frequently? How are all of these results affected by the fact that the responses were obtained by those who decided to respond to the survey posted on the Internet in America Online?
To estimate this proportion he went to a large student parking lot during the middle of a class day. He found that 325 out of 1037 cars (31%) were red.
use a normal approximation to find the probability of the indicated number of voters. in this case assume that 145
a company is studying the feasibility of buying an elevator for a building under construction. one proposal is a
suppose 94 of all students taking a beginning programming course fail to get their first program to run on the first
The standard deviation was $6050. Is there evidence at the 1% significance level that the cost of attendance has increased? State the hypothesis?
I have two contingency tables. One has a chi-square value of 14.40 and the other is 27.86. Both have 6 degrees of freedom. Based on an alpha of .01 do you reject the null hypothesis?
two different alloys are being considered for making lead-free solder used in the wave soldering process for printed
suppose the present value of a risky investment is approximately normally distributed with mean 10000 and standard
part -1make sure you read the output carefully. this output pertains to a set of juvenile court data looking at the
Nathan wants to approximate a binomial probability by normal curve areas. The number of trials is 50 and the probability of success for each trial is 0.95
Find out the regression variable that correlates best. Among which regression variable, carbon dioxide or methane correlates best with the earth's surface temperature.
Assuming the manufacturer's claim is true, what is the approximate probability of observing a sample mean of 52 months or less?
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